High Power Laser Science and Engineering, Volume. 11, Issue 5, 05000e59(2023)
Spatiotemporally mode-locked soliton fiber laser at 2.8 μm
Fig. 1. Schematic of the spatiotemporally mode-locked soliton Er:ZBLAN fiber laser. LD, laser diode; L1, spherical lens; L2 and L3, aspherical ZnSe lenses; M, dichroic mirror; OC, output coupler; HWP, half-wave plate; QWP, quarter-wave plate; ISO, isolator. Inset: the enlargement of the fiber facet obtained by a scanning electron microscope, showing a 30-μm fiber core diameter.
Fig. 2. (a) The output beam pattern recorded in continuous-wave operation. (b)–(d) The output beam patterns recorded in spatiotemporal mode-locking operation at different pump powers. (e) The measured
Fig. 3. (a) Recorded mode-locked pulse trains in the 200 ns and 1 ms time scales. (b) Sampled pulse trains at different spatial positions. (c) Intensities of sampled pulse trains versus spatial positions.
Fig. 4. (a) Measured radio-frequency (RF) spectrum of the mode-locked pulses. Inset: RF spectrum with 500 MHz span. (b) Measured autocorrelation trace of the mode-locked pulses (black dots) with a sech2 fit (blue solid line). (c) Optical spectrum of mode-locked pulses. These results were measured under the average output power of 1.09 W.
Fig. 5. The output average power and pulse energy versus pump power for the spatiotemporally mode-locked soliton fiber laser. The recorded data are the corresponding pulse duration and peak power.
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Ying’an Chen, Yicheng Zhou, Zhipeng Qin, Guoqiang Xie, Peng Yuan, Jingui Ma, Liejia Qian. Spatiotemporally mode-locked soliton fiber laser at 2.8 μm[J]. High Power Laser Science and Engineering, 2023, 11(5): 05000e59
Category: Research Articles
Received: May. 30, 2023
Accepted: Jun. 28, 2023
Published Online: Sep. 18, 2023
The Author Email: Guoqiang Xie (xiegq@sjtu.edu.cn)